html {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: black;
  background-image: radial-gradient(white, rgba(255, 255, 255, .2) 2px, transparent 40px), radial-gradient(white, rgba(255, 255, 255, .15) 1px, transparent 30px), radial-gradient(white, rgba(255, 255, 255, .1) 2px, transparent 40px), radial-gradient(rgba(255, 255, 255, .4), rgba(255, 255, 255, .1) 2px, transparent 30px);
  background-size: 550px 550px, 350px 350px, 250px 250px, 150px 150px;
  background-position: 0 0, 40px 60px, 130px 270px, 70px 100px;
  overflow-x: hidden;
  font-family: Verdana, sans-serif;
  font-size: 1rem;
  line-height: 1.8rem;
}

.container {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 5px;
  margin-bottom: 25px;
}

/* Loader */

.loader {
  background: whitesmoke;
  height: 100vh;
  width: 100vw;
  position: fixed;
  z-index: 10;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Navigation */

.navigation-container {
  position: fixed;
  top: -20px;
  border-top: 7px solid whitesmoke;
}

.navigation-items {
  display: flex;
  justify-content: center;
}

.background {
  position: fixed;
  right: 0;
  width: 100%;
  background: whitesmoke;
  height: 60px;
  z-index: -1;
}

.clickable {
  color: dodgerblue;
  cursor: pointer;
  user-select: none;
}

.clickable:hover {
  color: rgb(0, 99, 199);
}

/* Images Container */

.images-container {
  width: 800px;
  margin-top: 50px;
}

.card {
  background: white;
  margin: 10px 10px 20px;
  border: white 7px solid;
  border-radius: 5px;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
  transition: 0.3s;
}

.card:hover {
  box-shadow: 0 8px 16px 0 rgba(255, 255, 255, 0.8);
}

.card-img-top {
  width: 100%;
  height: auto;
  border-radius: 5px 5px 0 0;
}

.card-body {
  padding: 20px;
}

.card-title {
  margin: 10px auto;
  font-size: 24px;
}

/* Save Confirmation */

.save-confirmed {
  background: white;
  padding: 8px 16px;
  border-radius: 5px;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
  transition: 0.3s;
  position: fixed;
  bottom: 25px;
  right: 50px;
}

/* Hidden */

.hidden {
  display: none;
}

/* Large Smartphone (Vertical) */

@media screen and (max-width: 800px) {
  body {
    line-height: 1.4rem;
    font-size: 0.9rem;
    text-align: justify;
  }
  .images-container {
    width: 100%;
  }
  .card-title {
    font-size: 20px;
  }
  .save-confirmed {
    right: 25px;
  }
}